1 /* 2 * Force feedback support for hid-compliant for some of the devices from 3 * Logitech, namely: 4 * - WingMan Cordless RumblePad 5 * - WingMan Force 3D 6 * 7 * Copyright (c) 2002-2004 Johann Deneux 8 * Copyright (c) 2006 Anssi Hannula <anssi.hannula@gmail.com> 9 */ 10 11 /* 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 * 26 * Should you need to contact me, the author, you can do so by 27 * e-mail - mail your message to <johann.deneux@it.uu.se> 28 */ 29 30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 31 32 #include <linux/input.h> 33 #include <linux/hid.h> 34 35 #include "hid-lg.h" 36 37 struct dev_type { 38 u16 idVendor; 39 u16 idProduct; 40 const signed short *ff; 41 }; 42 43 static const signed short ff_rumble[] = { 44 FF_RUMBLE, 45 -1 46 }; 47 48 static const signed short ff_joystick[] = { 49 FF_CONSTANT, 50 -1 51 }; 52 53 static const signed short ff_joystick_ac[] = { 54 FF_CONSTANT, 55 FF_AUTOCENTER, 56 -1 57 }; 58 59 static const struct dev_type devices[] = { 60 { 0x046d, 0xc211, ff_rumble }, 61 { 0x046d, 0xc219, ff_rumble }, 62 { 0x046d, 0xc283, ff_joystick }, 63 { 0x046d, 0xc286, ff_joystick_ac }, 64 { 0x046d, 0xc287, ff_joystick_ac }, 65 { 0x046d, 0xc293, ff_joystick }, 66 { 0x046d, 0xc295, ff_joystick }, 67 }; 68 69 static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 70 { 71 struct hid_device *hid = input_get_drvdata(dev); 72 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 73 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 74 int x, y; 75 unsigned int left, right; 76 77 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff 78 79 switch (effect->type) { 80 case FF_CONSTANT: 81 x = effect->u.ramp.start_level + 0x7f; /* 0x7f is center */ 82 y = effect->u.ramp.end_level + 0x7f; 83 CLAMP(x); 84 CLAMP(y); 85 report->field[0]->value[0] = 0x51; 86 report->field[0]->value[1] = 0x08; 87 report->field[0]->value[2] = x; 88 report->field[0]->value[3] = y; 89 dbg_hid("(x, y)=(%04x, %04x)\n", x, y); 90 hid_hw_request(hid, report, HID_REQ_SET_REPORT); 91 break; 92 93 case FF_RUMBLE: 94 right = effect->u.rumble.strong_magnitude; 95 left = effect->u.rumble.weak_magnitude; 96 right = right * 0xff / 0xffff; 97 left = left * 0xff / 0xffff; 98 CLAMP(left); 99 CLAMP(right); 100 report->field[0]->value[0] = 0x42; 101 report->field[0]->value[1] = 0x00; 102 report->field[0]->value[2] = left; 103 report->field[0]->value[3] = right; 104 dbg_hid("(left, right)=(%04x, %04x)\n", left, right); 105 hid_hw_request(hid, report, HID_REQ_SET_REPORT); 106 break; 107 } 108 return 0; 109 } 110 111 static void hid_lgff_set_autocenter(struct input_dev *dev, u16 magnitude) 112 { 113 struct hid_device *hid = input_get_drvdata(dev); 114 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 115 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 116 __s32 *value = report->field[0]->value; 117 magnitude = (magnitude >> 12) & 0xf; 118 *value++ = 0xfe; 119 *value++ = 0x0d; 120 *value++ = magnitude; /* clockwise strength */ 121 *value++ = magnitude; /* counter-clockwise strength */ 122 *value++ = 0x80; 123 *value++ = 0x00; 124 *value = 0x00; 125 hid_hw_request(hid, report, HID_REQ_SET_REPORT); 126 } 127 128 int lgff_init(struct hid_device* hid) 129 { 130 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); 131 struct input_dev *dev = hidinput->input; 132 const signed short *ff_bits = ff_joystick; 133 int error; 134 int i; 135 136 /* Check that the report looks ok */ 137 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7)) 138 return -ENODEV; 139 140 for (i = 0; i < ARRAY_SIZE(devices); i++) { 141 if (dev->id.vendor == devices[i].idVendor && 142 dev->id.product == devices[i].idProduct) { 143 ff_bits = devices[i].ff; 144 break; 145 } 146 } 147 148 for (i = 0; ff_bits[i] >= 0; i++) 149 set_bit(ff_bits[i], dev->ffbit); 150 151 error = input_ff_create_memless(dev, NULL, hid_lgff_play); 152 if (error) 153 return error; 154 155 if ( test_bit(FF_AUTOCENTER, dev->ffbit) ) 156 dev->ff->set_autocenter = hid_lgff_set_autocenter; 157 158 pr_info("Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n"); 159 160 return 0; 161 } 162